Apply for a free boiler at ''New Boiler Grant'' on the UK government’s ECO scheme 2018. Affordable Warmth Obligation or Home Heat Cost Reduction Obligation (HHCRO) provides free boiler replacement and insulation grants to homeowners and tenants all across the UK. New Boiler Grant provides boiler grants and replacement services across England, Wales and Scotland in the UK. The free boiler grants funding is provided by UK energy companies UK energy companies.